Lt. Mike Madden of the San Bernardino Police Department, who was the first officer on scene at the mass shooting in the Inland Regional Center on Wednesday, Dec. 2, 2015, answers question from the media on Thursday, Dec. 3, 2015.

Madden said within two minutes of his arrival, they had four officers at the scene and they assembled as a group to run around the south side of the building to enter inside the east side of the building.

"I was asking officers to respond as quickly as possible because we had every belief at that time that we had people actively being shot inside the building," he recalled. "We wanted to get in there and we wanted to stop any further innocent people from being injured and possibly killed."

He said as he entered the building, the reports over the radio were confirmed as he found victims either dead or with injuries.

"As we entered the conference room, the situation was surreal," Madden said. "It was unspeakable carnage we were seeing."

Madden said he and his team had a hard decision to make, having to choose to help victims crying out for help or pursue the shooting suspects in order to prevent more innocent people from being shot.

"That was a difficult choice to have to make as well, passing people we knew were injured and in need of assistance, but our goal at that time had to be trying to locate the shooters and deal with them," he stated.

In all, 14 people were killed and 21 others injured in the attack that police said was orchestrated and carried out by 28-year-old Syed Rizwan Farook and 29-year-old Tashfeen Malik.

Farook and Malik were later killed in a hail of gunfire following a gun battle with officers a mile south of the IRC building.